Boring, turning, and planing tool.



J. G. BAKER. BORING, TURNING, AND PLANING TOOL.

APPLICATION FILED APR-6 1911.

Patented Dec. 31, 1912.

after/mu;

citizen of the United States,

State of New Jerse ,iosEPn a. BAKER, or VINELANQNEW JERSEY.

To all whom it may concern Be it knownthat I, JOSEPH G. BAKER, a .residing at Vinelarid, in the county of Cumberland, and

tain new'and usefu Improvement in Boring, Turning, and Planing Tools, of which the following is a specification.

My invention relates to new and useful improvementsin boring tools, and has for its object to produce an adjustable double or single boring tool which will use an approximately semi-circular cutter or hit, permitting very accurate adjustment and the usingup of almost the entirecutter.

A further object of the invention is to rovide a borin tool havin a shank for insertion in a c uck or too post or tool holder, said shank carrying eit er one or a pair of cutters anda pilot which may be -g mounted on the end of the shank, which will enter a previouslybored hole thus serving'as a guide, while the cutters of the boring'tool are enlarging the diameter of the hole. The use of a cutter of this character in a boring tool permits of a wide scope of adjustments and permits the cutter to be re-sharpened and used until it has become very short, so that very little waste occurs, making the cutters relatively inexpensive.

With these ends in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, I will describe its construction in detail, referring by letter to the accompanyin drawing forming a part of this speci cation, in which- Figure 1, is a side elevation ofa double boring tool made in accordance with my imrovement, showing a portion thereof roken away and in section to clearly illustrate the construction. Fig. 2, a similar view at ri htangles to Fig. 1. Fig. 3, an end view t ereof. Fig. 4, a side elevation of the single boring tool, a portion of the shank being broken ayvay. Fig. 5, a section at the line 02-01 of F1 4, looking in the direction of the arrow. ig. 6, an end view of Fig. 4. Fig. 7, a side elevation of one of the cutters. Fig. 8,.an edge view thereof.

carrying out my invention as here em- Eonmc, resume, AND PLANING- root.

Specification of Letters Patent. v Application flld April 6,1911. Serial No. 619,803.

,' have invented a cer-' 1 and 2,are formed a pair these being held' in .the parts on each side of the slotfC when or their equivaater of the hole to Patented adapted to be inserted Dec.3 1,191 2.1

bodied,,A represents the shank of the tool 7 in any suitable chuck T or tool holder, and this shank isproyid'ed' with an opening B,' passing entirely through the shank and from whichruns a slot G to the end of the foot of the shankfth is splitting said shank andpermitting the partsjto sprln apart.

In t e foot of oppositely d1s-'" posed, curved grooves C, in which fit the of the shank as shown in Figs.

approximately .curved cutters orbits-D,

place by the pressureof drawn together by screws E, lent, which pass through the two parts of the foot, but do not engage thefcutter's. By

releasing the pressure upon rooves .C to change the distance between their outer ends,

be bored. If found desirable, a pilot F ma he used, which is in the form of a collar aving a central opening G with which re 'sters the foot end of the shank and is furt or provided with oppositely disposed notches H, with which the cutters re lster. The engagement of said cutters wit the notches prevent the rotating of the pilot, thus overcoming the necessity of having any fastening means for the pilot, but if a fastening means is desired a set screw 2 may be threaded into the pilot, its inner end engaging the shank A. When this pilot is used, a hole is first drilled or bored in the work to correspond to the size of the pilot used and the boring tool is then placed against the work with said the previously drilled hole. This Wlll guide and steady the tool and prevent chattering and doing more accurate and satisfactory work with less liabilit of breakage tothe cutter. As it will be p ainly understood, the cutters may be used and re-sharpened until the cutters they may be adjusted by sliding them within the thus regulating the 'diampilot in a they have become so short that they cannot be held in the bar, and when this sta e is reached they will be so short that very little waste takes place, thus being comparatively inexpensive to the user.

In Figs. 4, 5 and 6 I have illustrated a single boring tool in which the shank is made similar to the one before described, with the exception that the curved groove C extends almost entirely through the shank, the object of the singleboring tool is for boring or turning a small hole and A tool as adapted for light work, the length oi the" through and the principal claim is that it will bore in a small hole and still have greater cutter adjustment for either large or small holes;

otherwise the two holes are identical.

just described is especially cutter permitting the latter to be ground and re-sharpened many times.

Of course I do not wish to be limited to 1( 'the exact details of construction as here shown, as these may be varied within the limits of the appended claims without departing from the spirit of my invention.

' Having thus fully described my inven- 15 tion, what I claim as new and useful, is

1. In combination, a boring tool comprising a shank and a pair of oppositely disposed curved cutters, a pilot in the form of a collar having an axial opening thereshank of the borlng tool registering with the axial opening and the curved cutters with the notches of the pilot.

2. A boring tool consisting of a shank having one end split and provided with a pair of oppositely disposed longitudinally curved grooves, a pair of unattached curved oppositely disposed notches, the

cutters resting in said grooves, means passing through the shank beyond the grooves, so as not to enter said grooves, fordrawing the parts of the shank against the cutters to glamp said cutters in place, and a pilotmounted upon the shank and having a notch registering with the cutters as specified.

3. A boring tool consisting of a shank, one end thereof being split in twain a suitable distance to allow the two halves or parts to be drawn together, said shank designed to hold a cutting device, curved cutting means mounted between the parts of the shank at its split end, means passing through the shank beyond the cutting means for drawing the parts of the shank against said cutting Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

